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International Conference on control, Automation and systems ( ICCAS)

作者： Ronnapop Jaisue Jutarut Chaoraingern Vittaya Tipsuwanporn Arjin Numsomran Phayupp Pholkeaw Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok Thailand Department of Instrument and Industrial Control Pathumthani Technical College Pathum Thani Thailand

This paper presents the design of Fuzzy PID controller based on ARM7TDMI for coupled-tanks process. The research is developed from previous studying of modified quadrupled-tanks process in the case of non-interacting second order process. The PID controller is designed by root locus technique, then it is improved a performance by combining with Fuzzy inference system for desired output response specification. Furthermore, PID Fuzzy inference system has been approximated into lookup table scheme for properly running on ARM7 embedded system. With the proposed method, the efficiency control algorithm can be performed on ARM7 platform that has a good performance and affordable costs. The experimental results have been shown that the design of Fuzzy PID embedded controller can achieve the performance specification requirement in level control.

关键词： Process control Fuzzy logic PD control Equations Level control Embedded systems

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Transfer Issues of control Optimizing Combustion from Small-scale to Medium-scale Biomass-fired Boilers

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IFAC Proceedings Volumes 2012年第21期45卷 207-211页

作者： Cyril Oswald Viktor Plaček Bohumil Šulc Alexander Hošovský Department of Instrumentation and Control Engineering Faculty of Mechanical Engineering Czech Technical University in Prague Czech Republic Department of Mathematics Informatics and Cybernetics Faculty of Manufacturing Technologies Technical University of Košice 080 01 Prešov Slovakia

The quick development of biomass fired boilers increased the attention being paid to the ecological and economical aspects of their operation. A very important role in the process of adapting to harder regulations has been the control technology replacing older simple solutions. Lately, we have been offered a very interesting opportunity to make use of our experience with small-scale boiler control which has been gradually equipped with instruments for more sophisticated experiments and to transfer verified control algorithms to a district heating boiler of medium-scale size. The following text describes what has been achieved in experiments with the small-scale boiler and how this can be transferred to bigger scale one. An algorithm to optimize the combustion process from the efficiency point of view, as well as harmful emission reduction is described in detail.

关键词： biomass boiler heating control lambda probe emissions combustion

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Simulation of electromagnetic field (EM) focusing capability on biological tissue through the application of C-type excitation coil screen

Simulation of electromagnetic field (EM) focusing capability...

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International Conference on Biomedical engineering (ICoBE)

作者： Zulkarnay Zakaria Noor Alia Mohd Zain Azian Azamimi Abdullah Sofi Yahya Ruzairi Abdul Rahim Muhammad Saiful Badri Mansor Abdul Rahim Mohd Disar Biomedical Electronic Engineering Department School of Mechatronic Engineering Universiti Malaysia Pedis Arau Perlis Malaysia Department of Control and Instrumentation Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia Skudai Johor Malaysia

In Magnetic Induction Tomography (MIT) or Electromagnetic Therapy system, excitation coil is applied with AC source in generating the electromagnetic (EM) field which then propagate and penetrate the object located in the region of interest (ROI). However, instead to the target object, the fields also propagate around the coil and create interference to the nearby circuit which contributes noise to the system while at the same time wasting the energy. This paper is focusing on the use of C-type excitation coil screen in focusing the EM field to the ROI and measure the penetration depth when different frequency is applied to the generation system.

关键词： Biological tissues Coils Magnetic fields Electromagnetics Magnetic field measurement Tomography Biomedical measurements

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Identification of nonlinear system using computational paradigms

Identification of nonlinear system using computational parad...

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International Conference on Automatic control and Artificial Intelligence (ACAI 2012)

作者： Rakesh B. Patel Satish K. Shah Instrumentation and Control Engineering Department Sardar Vallabhbhai Patel Institute of Technology Gujarat India Electrical Engineering Department Faculty of Technology and Engineering M.S. University Baroda Gujarat India

ISBN: (纸本)9781627481205

system identification is the powerful technique to identify the mathematical model of the unknown system based on input-output data. It is difficult with ordinary methods when the system is nonlinear with uncertainty. The computational paradigm has very high & efficient self-learning ability. It has great potentialities for mapping of nonlinear system particularly for identification. ARX based neural network is designed with back propagation and genetic algorithm training algorithms for nonlinear system. The comparative analyses of these algorithms are discussed in this paper.

关键词： system identification Computational paradigms Neural network Genetic algorithm Water tank problem

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Active vibration control using pole placement method of a flexible plate structure optimised by genetic algorithm

Active vibration control using pole placement method of a fl...

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IEEE Conference on control, systems & Industrial Informatics (ICCSII)

作者： T. A. Zahidi Rahman Intan Z. M. Darus Department of Mechanical and Manufacturing Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Malaysia Department of System Dynamics and Control Faculty of Mechanical Engineering Universiti Teknologi Malaysia Skudai Johor Malaysia

Active vibration control (AVC) of flexible structure has given remarkable attention in recent years due to its importance in engineering applications. This research investigates the application of system identification to model a dynamic system of flexible plate structure for active vibration control purpose. A second order ARX model optimised by genetic algorithm (GA) is employed to represent the dynamical system and then feedback controller using pole placement method is exploited to stabilise the system and attenuate the disturbance vibration. The result indicates that pole placement method has capability to ensure the stability of the system while suppressing the disturbance vibration of flexible plate system.

关键词： Genetics Load modeling Nickel

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Modeling and Validation of Magic Formula Tire Model

Modeling and Validation of Magic Formula Tire Model

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International Conference on Intelligent systems(ICIS’2012);International Conference on Automotive,Mechanical and Materials engineering(ICAMME’2012);International Conference on Electrical,Electronics and Biomedical engineering(ICEEBE’2012);International Conference on Eco-systems and Biological Sciences(ICEBS’2012);International Conference on Management and Social Sciences(ICMSS’2012);International Conference on Applied Chemistry and Pharmaceutical Sciences(ICACPS’2012)

作者： Mohammad Safwan Burhaumudin Pakharuddin Mohd Samin Hishamuddin Jamaluddin Roslan Abd Rahman Syabillah Sulaiman the Department of Automotive Engineering Faculty of Mechanical Engineering Universiti Teknologi Malaysia (UTM)81300 Skudai Johor Malaysia with the Department of System Dynamics and Control Faculty of Mechanical Engineering Universiti Teknologi Malaysia (UTM)81300 Skudai Johor Malaysia the Department of System Dynamics and Control Faculty of Mechanical Engineering Universiti Teknologi Malaysia (UTM)81300 Skudai Johor Malaysia

Tire model is required in order to study vehicle dynamic behavior for designing control system such as electronic stability control. In this study, a Magic Formula tire model was implemented using Matlab Simulink block diagram. Tire modeling is the first step to investigate vehicle handling stability. The model was developed based on a set of mathematical equations. The model was developed based on pure slip and combine slip condition. The feasibility of Magic Formula block diagram is validated via simulation software which is Carsim. For the validation procedure, Double Lane Change (DLC) test was used. The output forces and moments from Carsim are compared with the development model. The validation results are discussed. Once the model was validated, the Magic Formula model will be use as a subsystem for vehicle stability control.

关键词： Carsim, Magic Formula, Simulink, Tire Slip

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An anti-islanding for multiple photovoltaic inverters using harmonic current injections

An anti-islanding for multiple photovoltaic inverters using ...

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International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： Sutthipan Patthamakunchai Mongkol Konghirun Wanchak Lenwari Department of Electrical Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand

Islanding phenomenon is one of the major concerns in the distributed generator (DG) systems. Islanding occurs when one or more DGs supplied local loads without connecting to the grid utility. This unintentional condition must be detected with the minimum time possible to prevent the hazardous effects to a person worked in the system or equipment connected to the network. The two main methods of anti-islanding are passive and active methods. The passive methods are excellent in the speed of detection and power quality. However, the passive have relatively large non-detection zone (NDZ). On the other hands, the active methods have less relatively small NDZ and still provide a good speed of detection. This paper proposes an anti-islanding technique for multiple grid-connected inverters in photovoltaic (PV) system based on an active method. By injecting harmonic currents with the same or different harmonic orders and monitoring the change at the point of common coupling (PCC), the islanding condition can be diagnosed. Due to its excellent algorithm looking at specific frequencies, the Goertzel algorithm is employed in this paper to identify frequency components. Simulation results using PSIM software confirm the effectiveness to the technique in accordance with the requirements of the interconnection standards, IEEE Std. 1547 and IEEE Std. 929–2000.

关键词： Harmonic analysis Inverters Power harmonic filters Mathematical model IEEE standards

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An operational algorithm for satellite attitude determination from GPS carrier phase

An operational algorithm for satellite attitude determinatio...

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International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： C. Tatiyaworanun S. Purivigraipong Department of Control and Instrumentation and Mechatronics Engineering Mahanakorn University of Technology Bangkok Thailand Centre for Electronic System Design and Signal Processing Department of Electronic Engineering Mahanakorn University of Technology Bangkok Thailand

This paper presents an operational approach for determining satellite attitude from carrier phase GPS (Global Positioning system) measurements. A conventional recursive least square (RLS) estimator was implemented without requiring spacecraft dynamics. The proposed approach can be applicable for general space missions, particularly for real-time operation onboard-spacecraft. The attitude angles and electrical path difference (line bias) between antenna chains caused an offset error in GPS observables, can be estimated. The implemented estimator was tested with a simulated data, and the flight data collected onboard a mini-satellite orbiting in low Earth orbit.

关键词： Global Positioning system Position measurement Space vehicles Vectors Satellites Extraterrestrial measurements Antenna measurements

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Analysis of the Effect of Body Shape of Multiport Averaging Pitot Tube on Permanent Pressure Loss Using ANSYS/FLUENT

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IFAC Proceedings Volumes 2012年第7期45卷 322-326页

作者： Sona Sediva Miroslav Uher Brno University of Technology Department of Control and Instrumentation Faculty of Electrical Engineering and Communication Kolejní 2906/4 Brno 612 00 Czech Republic (+420 541 141 141) Brno University of Technology Department of Control and Instrumentation Faculty of Electrical Engineering and Communication Kolejní 2906/4 Brno 612 00 Czech Republic (+420 541 141 122)

This paper presents the results of simulations of the air flow in a circular pipe with multiport averaging Pitot tube and the effect of the shape of this probe to the permanent pressure loss. The four different types of shapes were evaluated and the flow around them was simulated in ANSYS/Fluent 13.0. It was found that the shape of the cross section has effect on the permanent pressure loss that causes the flowmeter inserted into the pipe. However permanent pressure loss at the multiport averaging Pitot tube is lower in comparison with permanent pressure loss caused by the orifice plate.

关键词： Multiport averaging Pitot tube flow measurement ANSYS/FLUENT permanent pressure loss simulation

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Two-degree-of-freedom Robust control for a Non-minimum Phase Electro-hydraulic system

Two-degree-of-freedom Robust Control for a Non-minimum Phase...

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第24届中国控制与决策会议

作者： Rozaimi Ghazali Yahaya Md Sam Mohd Fua'ad Rahmat Dirman Hanafi Zulfatman Mechatronic and Robotic Engineering Department Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn Malaysia86400 Batu Pahat Johor Malaysia Control and Instrumentation Engineering Department Faculty of Electrical Engineering Universiti Teknologi Malaysia81310 Skudai Johor Malaysia

Electro-hydraulic actuator (EHA) system inherently suffers from uncertainties, nonlinearities and time-varying in its model parameters which makes the modeling and controller designs are more complicated. The main objective of this paper is to perform a robust control design using discrete-time sliding mode control (DSMC) with two-degree-of-freedom control strategy. The proposed controller consists of feedback and feedforward combination which capable to reduce phase lag during the trajectory tracking of EHA system. The feedforward controller is developed by implementing the zero phase error tracking control (ZPETC) technique which the main difficulty arises from the nonminimum phase system with no stable inverse. Finally, a chaotic trajectory tracking is performed in the experimental works to show the robustness of DSMC controller and performance comparison is made with Linear-Quadratic-Regulator (LQR) and Proportional-Integral-Derivative (PID) controllers. The findings show that the proposed controller with ZPETC outperforms the LQR and PID controllers in terms of tracking accuracy.

关键词： Electro-hydraulic Actuator system, Sliding Mode control, Trajectory Tracking control and Two-degree-freedom control Structure

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